Google is having a tough time wringing ad revenue from YouTube, according to a front-page article in The Wall Street Journal. YouTube, which Google acquired in 2006 for about $1.7 billion, is expected to generate $200 million in revenue for the full year, less than what Google was expecting. Part of the problem is copyright litigation (from Viacom), so Google has significantly cut back on the number of clips it would sell against ads. Hoping to bolster the ad outlook for YouTube, Google plans to begin accepting “preroll” and “postroll” ads. Consumers hate them, but advertisers love them. Go figure.